Enhancements

• Made writing custom slice sources easier and more flexible: (#82)

  • Slice items can now be a contextlib.AbstractContextManager so custom slice functions can now be used with @contextlib.contextmanager.
  • Introduced SliceSource.close() so contextlib.closing()
    is applicable. Deprecated SliceSource.dispose().
  • Introduced new optional configuration setting slice_source_kwargs that contains keyword-arguments passed to a configured slice_source together with each slice item.
  • Introduced optional configuration setting extra that holds additional configuration not validated by default. Intended use is by a slice_source that expects an argument named ctx and therefore can access the configuration.

• Improved readability of the configuration reference by using setting categories and applied logical ordering of settings within categories (#85)

Full Changelog: v0.6.0...v0.7.0